RE: OT: high WIO on Linux
- From: Nuno Souto <dbvision@xxxxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Thu, 16 Mar 2006 07:55:50 +0800
Quoting Kevin Closson <kevinc@xxxxxxxxxxxxx>:
> >>>The SAN we have does not have average IO size. I know for
> >>>sure 2.6 is way better on large IOs, I just dont know wether
> >>>I can fully thrust iostat. What's your observeation with RH4
> >>>and the 2.6 kernel ?
>
> It passed through 512KB. That is what I've seen ... and that is
> "good"
>
> You can trust iostat -x if you don't "snack" on the data...do something
> like iostat -x 30
>
>
> --
> //www.freelists.org/webpage/oracle-l
>
>
Have you folks had any chance of trying out the different
IO schedulers in 2.6? The anticipatory one seems to be
the ticket for FTS-oriented systems. RH has an article on
some benchmarks they did that seems to indicate the cfq is
best overall for Oracle:
http://www.redhat.com/magazine/008jun05/features/schedulers/
Thoughts?
--
Cheers
Nuno Souto
from sunny Sydney
--
//www.freelists.org/webpage/oracle-l
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